unpickler.  Highest 32 bits of 64-bit size for BINUNICODE8 and BINBYTES8
opcodes no longer silently ignored on 32-bit platforms in C implementation.

unpickler.  Highest 32 bits of 64-bit size for BINUNICODE8 and BINBYTES8
opcodes no longer silently ignored on 32-bit platforms in C implementation.

unpickler.  Highest 32 bits of 64-bit size for BINUNICODE8 and BINBYTES8
opcodes no longer silently ignored on 32-bit platforms in C implementation.

and nested format_specs. Patch by Anthon van der Neut.

Replace script_helper.assert_python_ok() with subprocess.run().

It looks like the check for integer overflow doesn't work on x86 OpenBSD 5.8.

Issue #25227: Optimize ASCII and latin1 encoders with the ``surrogateescape``
error handler: the encoders are now up to 3 times as fast.

Initial patch written by Serhiy Storchaka.

Issue #25220: Fix test_regrtest.test_tools_buildbot_test() on release build (on
Windows), pass "+d" option to test.bat.

* test all available ways to run the Python test suite
* test many regrtest options: --slow, --coverage, -r, -u,  etc.

Note: python -m test --coverage doesn't work on Windows.

Issue #25233: Rewrite the guts of Queue to be more understandable and correct. (Merge 3.5->default.)